use std::io;
use std::cmp::Ordering;
use rand::Rng;
pub fn main() {

    loop{
        println!("Guess the number!");
        let secret_number = rand::thread_rng().gen_range(1, 101);
        println!("secret number is :{}",secret_number);
        println!("Please input your guess.");
    
        let mut guess = String::new();
    
        io::stdin().read_line(&mut guess)
            .expect("Failed to read line");
    
            let guess: u32 = match guess.trim().parse() {
                Ok(num) => num,
                Err(_) =>{
                    println!("input format error");
                    continue;
                } 
            };
          
    
        println!("You guessed: {}", guess);
        match guess.cmp(&secret_number) {
            Ordering::Less => println!("Too small!"),
            Ordering::Greater => println!("Too big!"),
            Ordering::Equal =>{
                println!("You win!");
                break;

            }
        }

    }
   
}